JPH08333772A - Upper structure of turning working machine - Google Patents

Abstract

PURPOSE: To make radiator air flowable not only to the upper part, front part and rear part of an engine but also to the lower part of the engine so as to make heat balance desirable without retaining air in an engine room, and discharge hot air dispersedly. CONSTITUTION: A turning base 4 supported in a turnable state on a traveling machine base is provided with a support part for supporting a working device. The turning base 4 is mounted with an engine 12 and a radiator 38 at the rear part, a tank at one lateral side part, and a control valve at the other lateral side part respectively. The engine 12, radiator 38 and tank are surrounded by a turning base cover 34. An intake port 43 for taking air into an engine room 39 by suction of the radiator 38, and an exhaust port 44 for exhausting air are formed at the turning base cover 34. An air flow passage 42 for making radiator air flow is formed between the lower part of the engine 12 and the turning base 4, and a discharge opening 49 for exhausting radiator air is formed on the side close to the exhaust port 44 of the turning base 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper structure of a swing working machine such as a backhoe.

[0002]

2. Description of the Related Art For example, in a revolving work machine for civil engineering / construction such as a backhoe, a revolving base rotatably supported on a traveling machine base and a support unit for supporting a backhoe working device at a front part in the middle of the left and right. The engine and the radiators and hydraulic pumps on the left and right sides of the engine are mounted in the middle part on the left and right sides, the control valve and the operating part are mounted on the front part on the left and right sides, and the fuel tank and the oil tank are mounted on the other side parts.

These engines, radiators, tanks, etc. are surrounded by a swivel base cover. In the swivel cover, an intake port for taking in air to the engine room and a discharge port for exhausting air by suction of the radiator are formed. ing.

[0004]

In the above-mentioned prior art, the engine is cooled by the suction air of the radiator, but the suction air of the radiator flows to the upper and front and rear sides of the engine, but there is a reinforcement stand or the like below. It may be difficult to flow, hot air may easily accumulate in the engine room, and the seat balance may deteriorate.

Further, since the engine room and the operating section side where the control valve is arranged are in communication with each other, noise and hot air in the engine room may leak to the operating section side. Therefore, it is conceivable to partition the engine room and the operating section side where the control valve is arranged with a partition wall, but the hydraulic piping connecting the oil tank and the hydraulic pump in the engine room penetrates through this partition wall. When the engine room is inserted from the driver's side, it is difficult to prevent noise and hot air in the engine room from leaking to the driver's side.

According to the present invention, air is taken in from a suction port on the side of the swivel base cover by suction of a radiator, and this air is circulated not only above and in front of and behind the engine but also below the engine, and the exhaust port of the swivel cover is exhausted. And the discharge port of the swivel base in the vicinity of the swivel platform to allow the air in the engine room to flow, improve the heat balance, and disperse and discharge hot air. The purpose is to provide.

Further, the present invention provides a superstructure of a swivel work machine in which a partition wall is provided between the engine room and the front side thereof to prevent noise and hot air from leaking from the engine room to the operating section side. The purpose is to do. Further, the present invention provides a hydraulic pipe connected to the hydraulic pump by providing a partition wall between the engine room and the front side thereof, and disposing the hydraulic pipe connecting the hydraulic pump and the oil tank on the engine room side. Even if there is, it is an object of the present invention to provide an upper structure of a swivel work machine capable of preventing noise and hot air from leaking from the engine room to the operating section.

[0008]

A first concrete means for solving the problems in the present invention is a supporting part 5 for supporting a working device 6 on a revolving base 4 which is rotatably supported on a traveling machine base 3. The engine 12 and the radiator 3 at the rear of the swivel 4.
8, the tank on one side on the left and right, and the control valve 51 on the other side on the left and right.
Respectively equipped with the engine 12, the radiator 38
In the upper structure of the swivel work machine, the tank is surrounded by the swivel base cover 34, and the swirl base cover 34 is provided with an intake port 43 for taking in air to the engine room 39 by suction of the radiator 38 and an exhaust port 44 for discharging the air. An air flow passage 42 for flowing a radiator wind is formed between the lower part of the engine 12 and the swivel base 4, and an exhaust port 44 of the swivel base 4 is formed.
That is, the discharge port 49 for discharging the radiator wind is formed on the near side.

The second concrete means for solving the problems in the present invention is, in addition to the first concrete means, a partition for partitioning the engine room 39 and the control valve 51 front side thereof. That is, the wall 50 is provided. In addition to the first specific means, a third specific means for solving the problem in the present invention is provided with a hydraulic pump 32 on the side of the engine 12 to provide an oil tank 10 and a hydraulic pipe 47 on one left and right side. A partition wall 5 that connects the engine room 39 and the control valve 51 disposed in front of the engine room 39 to separate the two.
0 is provided and the hydraulic pipe 47 is arranged closer to the engine room 39 than the partition wall 50.

[0010]

The swivel base 4 is provided with a supporting portion 5 for supporting the working device 6, and the engine 12, the hydraulic pump 3 are provided at the rear of the swivel base 4.
2 and the radiator 38 are installed on the left and right sides of the oil tank 1
0 is equipped with a control valve 51 on the other side of the left and right sides, respectively, and the engine 12, the radiator 38 and the oil tank 10 are connected.
Is surrounded by a swivel base cover 34.

An intake port 43 and an exhaust port 44 are formed in the swivel base cover 34, and the air taken into the engine room 39 from the intake port 43 by the suction action of the radiator 38 is above and behind the engine 12. Not only that, the air flows through the air flow passage 42 between the lower portion of the engine 12 and the swivel base 4, flows without staying and cools the engine 12, and hot air is discharged from the exhaust port 44 of the swivel base cover 34 and the exhaust port 44. It is dispersed and discharged from the discharge port 49 of the swivel base 4 on the near side.

The engine room 39 and the control valve 5 in front of it
The partition wall 50 separates from the first arrangement side, and the hydraulic pipe 47 connecting the hydraulic pump 32 and the oil tank 10 is arranged closer to the engine room 39 than the partition wall 50, and penetrates the partition wall 50. Therefore, the radiator pipe that cools the engine 12 also cools the hydraulic pipe 47, so that noise and hot air from the engine room 39 do not leak to the operating unit side and are discharged outward from the discharge port 44 and the discharge port 49.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 8 and 9, a backhoe 1 exemplified as a swivel work machine has a swivel base 4 rotatably supported around a vertical axis on a traveling machine base 3 having crawler traveling devices 2 on the left and right. A lower portion of a backhoe device (working device) 6 is supported by the backhoe support unit 5.

On the swivel base 4, a backhoe support portion 5 is provided.
An operating unit 7 is formed on the left side of the vehicle, a sunshade device (operating unit protector) 8 that partitions the backhoe unit 6 and covers the operating unit 7 is mounted, and a fuel tank 9 and an oil tank are installed on the right side of the backhoe supporting unit 5. 10 and the like are arranged, and a metal support frame 11 and an engine 12 are mounted on the rear side of these.

The upper part of the swivel base 4 is covered with a swivel base cover 34. The swivel base cover 34 has a lower cover arranged on the outer peripheral portion of the swivel base 4, a main body cover 13 arranged above, and a bonnet 15 in the rear portion. Fuel tank 9
The oil tank 10 is surrounded by a main body cover 13 and an upper part thereof is covered by a protective cover 14, and the engine 12 is arranged laterally. The main body cover 13 covers the front upper part and the rear upper part and the rear part of the bonnet 15. It is surrounded by. Reference numeral 16 denotes a weight arranged on the upper rear portion of the swivel base 4.

The backhoe device 6 comprises a backhoe support 5
A boom 19 whose base is supported via a boom pivot shaft 17 and which is elevated and lowered via a boom cylinder 18, and a boom 19 which is supported at the tip of the boom 19 via an arm pivot shaft 20 and extends and retracts via an arm cylinder 21. The arm 22 and a bucket (work implement) 25 supported by a bucket pivot shaft 23 at the tip of the arm 22 and scraped by a bucket cylinder 24 for soil removal operation.

The boom 19 is a backbone boom 19A supported by a boom pivot shaft 17, and an intermediate boom 19B connected to the tip of the boom 19A via an intermediate support shaft 28 so as to be swingable about a vertical axis. The intermediate boom 19B has a tip boom 19C connected to the tip end thereof via a tip support shaft 29 so as to be swingable about a vertical axis. An offset cylinder 30 is provided between the backbone boom 19A and the intermediate boom 19B, and the backbone boom 19A and the tip boom 19C are connected by a linkage link 31 for forming a parallel four-link structure, as shown in FIG. In addition, the operation of the offset cylinder 30 causes the tip boom 19C, the arm 22, and the bucket 25 to be laterally offset with respect to the backbone boom 19A.

The backhoe 1 drives the hydraulic pump 32 by the engine 12 to supply the oil in the oil tank 10 to the hydraulic motor of the crawler traveling device 2 via the control valve 51, and at the same time, the hydraulic cylinders 18 and 21. , 24, 30 and the like can be appropriately supplied. 1-5, 8,
In FIG. 9, a backhoe support portion 5 is formed on a substantially circular revolving base 4 rotatably supported on the traveling machine base 3 from a front end to a center side in a middle portion in the left-right direction, and on the left side of the backhoe support portion 5. The sunshade device 8 is arranged together with the operation part 7 arranged via the operation base 53, the fuel tank 9, the oil tank 10 and the battery 52 are mounted on the right side, and the support frame 11, the engine 12 are arranged on the rear side. Radiator 38
A hydraulic pump 32 and the like are mounted.

The backhoe support 5 has left and right side walls 54 fixed to the swivel base 4, and a bottom wall 55 and a back wall fixed between the left and right side walls 54. The left and right side walls 54 connect the boom pivot shaft 17 of the backbone boom 19A. And a support pin 58 of the boom cylinder 18 is supported by a bracket 57 fixed to the bottom wall 55. The support frame 11 is divided into a first divided frame 11A and a second divided frame 11B, and the first divided frame 11A is formed by welding two or three pipes having a round, elliptical or rectangular cross section. And has three legs, each leg being fixed to the swivel base 4, a front support 61, a bracket 62 fixed to the rear ends of the left and right side walls 54, and a swivel base 4 being fixed. It is fixed to the support base 63.

The first divided frame 11A has a U-shape in a front view, a side view and a plan view.
Is vertically arranged so as to straddle the vehicle in the front-rear direction, and a seat base 27 is attached to the upper part thereof. The seat base 27 is located above the engine 12 and provided with a cushion for supporting the rear part of the driver's seat 7A. The right end of the sunshade device 8 is attached via the bolts of the rear column 8A.

The second divided frame 11B is formed by a strip plate material or a pipe material in an L-shape in a front view, and one leg is fixed on the swivel base 4 via a support plate 65 and has a horizontal shape. The upper part of the is horizontally arranged so as to straddle the engine 12 in the left-right direction, and the left end of the upper part and the bracket fixed to the middle part are detachably connected to the first split frame 11A.

The front upper edge of the bonnet 15 is connected to the upper portion of the second divided frame 11B via a pivotal support tool, and the open state of the bonnet 15 can be held by an open holding tool. The body cover 13 is made of a synthetic resin, particularly a resin having high heat resistance and weather resistance and high strength.
Of the fuel tank 9 and the rear of the operating unit 7
And a side portion of the oil tank 10 that covers the sides of the oil tank 10, and a left portion 13L that covers the rear of the operating unit 7 and a right portion 13R that covers the sides of the fuel tank 9 and the oil tank 10 are divided into right and left portions. The left divided main body cover 13L covers the upper surface around the seat base 27, and the cushion is exposed.

A partition wall 50 for partitioning the engine room 39 and the control valve 51 side is provided on the rear side of the operation base 53 in front of the front support base 61. The partition wall 50 prevents hot air on the engine room 39 side from reaching the control valve 51. The partition wall 50 is formed by a plate material fixed to the front surface of the front support base 61 and protruding from the front support base 61 to the driving base 53, and a vertical wall of the left split main body cover 13L reaching from the plate material to the driver's seat 7A. However, the plate may be sized to reach the driver's seat 7A.

The left and right divided main body covers 13R and 13L are
An intake port 43 for taking in air to the engine room 39 and an exhaust port 44 for exhausting hot air from the engine room 39 are formed on the left and right sides, respectively.
A suction type 8 sucks air from the suction port 43 and discharges it from the discharge port 44 by suction of the radiator 38.

A partition wall is formed between the outer periphery of the radiator 38 and the right divided main body cover 13R and the bonnet 15 with a plate material or a sponge, and the engine room 39 is partitioned by the radiator 38 before and after the radiator 38 so that the air suction efficiency by the radiator 38 is increased. I am trying to increase. The front and rear support 61,
Reference numeral 63 is a base for supporting the engine 12 via mount rubber. The engine 12 is supported by the front and rear support bases 61 and 63, the oil pan 12A thereof is located above the swivel base 4, and there is no reinforcing material or the like between the lower part of the engine 12 and the swivel base 4. An air flow passage 42 is formed to allow radiator air to flow in order to cool the engine 12.

That is, below the engine 12, there is not provided a reinforcing member in the front-rear direction for reinforcing the rear part of the swivel base 4, and the engine 12 has a front-rear support base 6 long in the left-right direction.
Since it is supported by Nos. 1 and 63, an air flow passage 42 that is opened in the left-right direction is formed below it, and the radiator wind from the radiator 38 is only above and in front of and behind the engine 12 and the hydraulic pump 32. Instead, it also flows downward.

A discharge port 49 is formed in the swivel base 4 at a position substantially below the hydraulic pump 32 so that the hot air flowing through the air flow passage 42 can be discharged below the swivel base 4. The discharge port 49 may be formed by cutting out the outer periphery of the swivel base 4, or may be formed in the lower cover. The discharge port 49 is located in the vicinity of the discharge port 44 of each left main body cover 13L, and the discharge port 44 discharges the hot air outward, whereas the discharge port 49 discharges downward and rearward and is dispersed at both ports. Discharge.

As shown in FIG. 1, a radiator 38
A reinforcement member 48A in the front-rear direction is provided in the vicinity of, but does not interfere with the flow of the radiator wind, and instead of or together with this reinforcement member 48A, a reinforcement member 4 indicated by a two-dot chain line is shown.
It is also possible to provide one or a plurality of 8Bs. The right divided main body cover 13R surrounding the fuel tank 9 and the oil tank 10 on the right side of the swivel 4 and the protective cover 14 form a tank room 39, and the front portion of the protective cover 14 has a pivot support 66 interposed therebetween. And is pivotally supported on the front portion of the right divided main body cover 13R, and the rear portion of the protective cover 14 is pivoted forward to open the tank room 40.

Reference numeral 47 denotes the oil tank 10 and the hydraulic pump 32.
Is a suction hose (hydraulic pipe) connected to the suction hose 47. The suction hose 47 penetrates the right side wall 54 from the side portion of the oil tank 10 and is bent rearward so as to enter the engine room 39 and behind the partition wall 50. The hydraulic pump 32 is reached through the lower side of the inverted L-shaped front support base 61. Therefore, no hose through hole is formed in the partition wall 50, noise and hot air do not leak from the engine room 39 to the control valve 51 side, and the suction hose 47 can be cooled by the intake air of the radiator 38. There is.

The suction hose 47 may be formed of a metal pipe, but a rubber hose capable of relaxing the pulsation of the pump is preferable, and is connected to the rear portion of the oil tank 10 as shown by a two-dot chain line in FIG. , Radiator 3
If it is bent in a U shape on the front side of 8, the cooling will be further improved. The return hose is also arranged similarly to the suction hose 47.

FIG. 6 shows a first example of the mounting structure of the oil tank 10. A pair of front and rear brackets 67 are fixed to the lower surface of the oil tank 10. The bracket 67 has a hook shape in cross section, and the oil tank 10 is attached to the swivel base 4 by bolting from above. Since the oil tank 10 has a drain plug at the bottom, it is slightly lifted.

A blazer 68 is provided on the upper surface of the oil tank 10.
Is provided, a battery stopper 69 is provided, and the battery 52 is attached. The battery 52 and the oil tank 10 can be attached and detached by opening the protective cover 14. FIG. 7 shows a second example of the mounting structure of the oil tank 10, and a pair of left and right brackets 70 that are long in the front-rear direction are fixed to the lower surface of the oil tank 10. The bracket 70 is formed of a strip plate or a square tube, and is bolted to the swivel 4 from above.

The present invention is not limited to the above embodiment, but can be variously modified. For example, the backhoe support part 5 may be provided in a front projecting shape on the front part of the swivel base 4 in the middle of the left and right, and the suction port 43 and the discharge port 44.
The discharge port 49 is formed to be relatively large, but it may be formed by punching a large number of small holes, or a punching metal or a wire net may be attached to the inside thereof.
Further, only a hole for removing the drain plug is formed at a position substantially below the engine 12 of the swivel base 4, but this hole is formed to be large so that the hot air flowing through the air flow passage 42 in the same manner as the discharge port 49. May be a hole that can be discharged below the swivel base 4.

[0034]

According to the present invention described in detail above, the air flow passage 42 for flowing the radiator wind is formed between the lower part of the engine 12 and the swivel base 4, and the radiator near the discharge port 44 of the swivel base 4. Since the discharge port 49 for discharging the wind is formed, the radiator wind can be made to flow not only above and in front of and behind the engine 12 but also below, and the air in the engine room 39 is not retained and heat is generated. Good balance and hot air can be dispersed and discharged.

Further, since the partition wall 50 is provided between the engine room 39 and the side where the control valve 51 is arranged in front of the engine room 39, noise and hot air from the engine room 39 are prevented from leaking to the operating section 7. You can Further, a hydraulic pump 32 is provided on the side of the engine 12 and connected to the oil tank 10 on the left and right sides via a hydraulic pipe 47, and both are connected between the engine room 39 and the control valve 51 front side thereof. A partition wall 50 for partitioning the
Is located closer to the engine room 39 than the partition wall 50, it is possible to prevent noise and hot air from the engine room 39 from leaking to the operating unit 7 even if there is the hydraulic pipe 47 connected to the hydraulic pump 32. The hydraulic pipe 47 can also be cooled.

[Brief description of drawings]

FIG. 1 is a rear view of an essential part showing an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front view of the same section.

FIG. 4 is a left side view showing the relationship between the frame and the cover on the upper part of the backhoe.

FIG. 5 is a plan view showing the relationship between the frame and the cover.

FIG. 6 is a perspective view showing a first example of an oil tank mounting structure.

FIG. 7 is a perspective view showing a second example of the attachment structure of the oil tank.

FIG. 8 is a side view showing the entire backhoe.

FIG. 9 is a plan view showing the entire backhoe.

[Explanation of symbols]

 1 backhoe 3 traveling platform 4 swivel 6 backhoe device (working device) 7 driver 7A driver's seat 9 fuel tank 10 oil tank 11 support frame 12 engine 32 hydraulic pump 34 swivel cover 38 radiator 39 engine room 42 airflow passage 43 Suction port 44 Discharge port 47 Suction hose (hydraulic piping) 50 Partition wall 51 Control valve

Claims (3)

[Claims] 1. A supporting part (5) for supporting a working device (6) on a swivel base (4) which is swivel-supported on a traveling platform (3).
The engine (12) and the radiator (38) are mounted at the rear of the swivel base (4), the tank is mounted on one of the left and right sides, and the control valve (51) is mounted on the other side of the left and right. , The radiator (38) and the tank are surrounded by a swivel cover (34), and the engine room (39) is sucked by the radiator (38) to the swivel cover (34).
In a superstructure of a swivel work machine having an intake port (43) for taking in air and an exhaust port (44) for exhausting air, air for flowing a radiator air between the lower part of the engine (12) and the swivel base (4). A superstructure of a swivel work machine, characterized in that a flow passage (42) is formed, and a discharge port (49) for discharging a radiator wind is formed near the discharge port (44) of the swivel base (4). . 2. The swirl according to claim 1, wherein a partition wall (50) for partitioning the engine room (39) and a control valve (51) arrangement side in front of the engine room (39) is provided. Superstructure of work machine. 3. A hydraulic pump (32) is provided on the side of the engine (12) to provide an oil tank (10) on the left and right sides.
Is connected via a hydraulic pipe (47), and a partition wall (50) is provided between the engine room (39) and a control valve (51) arrangement side in front of the engine room (39) to provide a partition wall (50) for the hydraulic pipe (47). From the partition wall (50) to the engine room (3
The upper structure of the swing working machine according to claim 1, wherein the upper structure is arranged on the 9) side.